Firestore/Firebase Emulator Not Running

Question

I'm trying to test my functions locally using the guide listed here https://firebase.google.com/docs/functions/local-emulator

I have installed the latest firebase-tools using

npm install -g firebase-tools

In my package.json I confirmed to be running

"firebase-admin": "^7.3.0",
"firebase-functions": "^2.3.1",

When I try to run my functions using

firebase emulators:start

It gives me the below output. What am I doing wrong?

Starting emulators: ["functions"]
⚠  Your requested "node" version "8" doesn't match your global version "11"
✔  functions: Emulator started at http://localhost:5001
i  functions: Watching "[FUNCTIONS FOLDER PATH]" for Cloud Functions...
⚠  Default "firebase-admin" instance created!
⚠  Ignoring trigger "[FUNCTION NAME]" because the service "firebaseauth.googleapis.com" is not yet supported.
⚠  Ignoring trigger "[FUNCTION NAME]" because the Cloud Firestore emulator is not running.
⚠  Ignoring trigger "[FUNCTION NAME]" because the Cloud Firestore emulator is not running.
⚠  Ignoring trigger "[FUNCTION NAME]" because the Cloud Firestore emulator is not running.
⚠  Ignoring trigger "[FUNCTION NAME]" because the Cloud Firestore emulator is not running.
⚠  Ignoring trigger "[FUNCTION NAME]" because the Cloud Firestore emulator is not running.
⚠  Ignoring trigger "[FUNCTION NAME]" because the Cloud Firestore emulator is not running.
⚠  Ignoring trigger "[FUNCTION NAME]" because the Cloud Firestore emulator is not running.
⚠  Ignoring trigger "[FUNCTION NAME]" because the Cloud Firestore emulator is not running.
⚠  Ignoring trigger "[FUNCTION NAME]" because the Cloud Firestore emulator is not running.
⚠  Ignoring trigger "[FUNCTION NAME]" because the Cloud Firestore emulator is not running.
⚠  Ignoring trigger "[FUNCTION NAME]" because the Cloud Firestore emulator is not running.

etc.
etc.
etc.
i  functions: HTTP trigger initialized at http://localhost:5001/[APP NAME]/us-central1/[FUNCTION NAME]

[2019-05-15T21:43:52.436Z]  @firebase/database: FIREBASE WARNING:  
{"code":"app/invalid-credential","message":"Credential implementation provided to   
initializeApp() via the \"credential\" property failed to fetch a valid Google  
OAuth2 access token with the following error: \"Error fetching access token: Error  
while making request: getaddrinfo ENOTFOUND metadata.google.internal  
metadata.google.internal:80. Error code: ENOTFOUND\"."} 

Answer 1

Could be you don't have firestore configured properly in your firebase.json file. This makes emulator not being started.

What you need is to run firebase init firestore in your project directory. This would create firestore rules and indexes files and update your firebase.json correspondingly.

Answer 2

If checking Firebase setup doesn't work, try this:

• Run firebase emulators:start. Check if displayed error request to install OpenJDK.
• If your functions interacts with Firebase APIs or Google APIs, you need to setup admin credentials. Check how to do it here: https://firebase.google.com/docs/functions/local-emulator
• You may need to emulate functions and firestore at the same time. Use firebase emulators:start --only functions,firestore or firebase serve --only functions,firestore.
• Keep in mind that pubsub is not suported yet. As Sam Stern comments, pub sub is now supported.

Answer 3

I had the same issue there were a few things wrong for me

1. ensure the emulator is installed by running firebase setup:emulators:firestore

My second issue was that my initial firebase configuration had installed the config files into my home folder rather then the project folder as described [here] this meant so my project was missing firestore.rules and firestore.indexes.json and some of the configuration settings.

run firebase init to generate these files

Once I fixed these two things it worked for me. I hope this helps.

As a reference my firebase.json looks like this

{
  "functions": {
    "predeploy": [
      "npm --prefix \"$RESOURCE_DIR\" run lint",
      "npm --prefix \"$RESOURCE_DIR\" run build"
    ]
  },
  "firestore": {
    "rules": "firestore.rules",
    "indexes": "firestore.indexes.json"
  },
  "hosting": {
    "public": "dist",
    "ignore": ["firebase.json", "**/.*", "**/node_modules/**"],
    "rewrites": [
      {
        "source": "**",
        "destination": "/index.html"
      }
    ]
  },
  "emulators": {
    "firestore": {
      "port": "5002"
    }
  }
}

Answer 4

As of version 7.8.0 of the Firebase CLI (firebase-tools) there is a new command firebase init emulators that will help you set up all the emulators you want to run.

Answer 5

Actually this error comes when the user initialize the firebase project without database. So the command firebase emulators:start --only database can not start the database emulator because it need the "database.rules.json" file and the configuration entries for database in the firebase.json file . So if you forgot to initialize the database in firebase init command then you can add firebase database whenever you want by following firebase CLI command

firebase init database

then you can run firebase emulators:start --only database for starting the database emulator in the localserver .

and If you want to use emulator for both function and database then run firebase serve --only functions,database